AstraZeneca says third dose helps against Omicron

AstraZeneca says third dose helps against Omicron

A test tube labelled with the Vaccine is seen in front of AstraZeneca logo in this illustration taken, September 9, 2020. REUTERS/Dado Ruvic/Illustration AstraZeneca said on Thursday that preliminary data from a trial showed that its COVID-19 shot, Vaxzevria,...